X-Plane 11.40+ Burnelli RB-2 1.0. The Burnelli RB-2 was a 1920s American twin-engined biplane freighter or airliner, designed by Vincent Burnelli with a lifting body fuselage. At the time it was the world's largest commercial freighter. It was the first aircraft to carry a motor car inside its fuselage. This is a recreation of the RB2. As none currently exist, I built this aircraft with full modern instruments. Documentation included in the package. By Billy Bargagliotti.